Resonant Transmission of Electromagnetic Fields through Subwavelength Zero-$\epsilon$ Slits

Abstract

We theoretically investigate the transmission of electromagnetic radiation through a metal plate with a zero-$\epsilon$ metamaterial slit, where the permittivity tends towards zero over a given bandwidth. Our analytic results demonstrate that the transmission coefficient can be substantial for a broad range of slit geometries, including subwavelength widths that are many wavelengths long. This novel resonant effect has features quite unlike the Fabry-Pérot-like resonances that have been observed in conductors with deep channels. We further reveal that these high impedance ultranarrow zero-$\epsilon$ channels can have significantly {\it greater} transmission compared to slits with no wave impedance difference across them.

References in corpus (9)

• Demonstration of Near-Infrared Negative-Index Materials
• Theory of Supercoupling, Squeezing Wave Energy, and Field Confinement in Narrow Channels and Tight Bends Using Epsilon-Near-Zero Metamaterials
• Design of Matched Zero-Index Metamaterials Using Non-Magnetic Inclusions in Epsilon-Near-Zero (ENZ) Media
• Transmission properties of a single metallic slit: From the subwavelength regime to the geometrical-optics limit
• Enhanced transmission versus localization of a light pulse by a subwavelength metal slit: Can the pulse have both characteristics?
• Enhanced transmission versus localization of a light pulse by a subwavelength metal slit
• Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared
• Parametrically Shielding Electromagnetic Fields by Nonlinear Metamaterials
• Enhanced Transmission and Reflection of Femtosecond Pulses by a Single Slit

Cited by in corpus (2)

• Funneling Light Through a Subwavelength Aperture with Epsilon-Near-Zero Materials
• Near-perfect absorption in epsilon-near-zero structures with hyperbolic dispersion